A harsher version of stop and go traffic. Most common at high speeds. Can result in whiplash and headaches. :D
Slam when you slam on your breaks.
Jerk when you jerk forward going from 0 to 60 in less than 5 seconds XD
Most common in California!

Jeezmom!! Can you drive any easier? You're giving me whiplash!!
Sorry! We are in the middle of slam and jerk traffic!
Oh.